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Cutting a 3" cast iron pipe
I need to cut a 3" cast iron vent pipe to tie to a new PVC vent.
I am using a Milwaukee sawzall with a metal blade and it kept skidding and wouldn't start the cut at the right place. I then used a 4-1/2" angle grinder with a metal blade and cut a little notch and now I can engage with the sawzall without skidding. However after 15 minutes of cut I don't think I am making a significant dent at all. I used the same sawzall and cut through copper and EMT electrical conduits like knife through butter. But this CI pipe I am not making any progress. I can't use the angle grinder there is simply not enough room around it. I went to HD and they recommended a "grit iron" blade. Got that and it seems to cut a little bit, but again after 15 minutes, I am not even 10% through the pipe. The way I am going it would take 10 hours. I remember seeing another blade named "ugly metal blade" I wonder if that would be better. Is there a better way to do this? I know a chain cutter may be used, but I want to avoid it. Part of the reason I am cutting this is because the lower section was cut by a plumber who used a chain cutter but created a vertical crack line and now I am trying to cut away all the damaged section. Thanks, MC |
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